18669412 has 12 divisors (see below), whose sum is σ = 32732140. Its totient is φ = 9317376.

The previous prime is 18669403. The next prime is 18669433. The reversal of 18669412 is 21496681.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9585216 + 9084196 = 3096^2 + 3014^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1737 + ... + 6352.

Almost surely, 2^18669412 is an apocalyptic number.

It is an amenable number.

18669412 is a deficient number, since it is larger than the sum of its proper divisors (14062728).

18669412 is a wasteful number, since it uses less digits than its factorization.

18669412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8670 (or 8668 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 18669412 is about 4320.8114978555. The cubic root of 18669412 is about 265.2834844585.

The spelling of 18669412 in words is "eighteen million, six hundred sixty-nine thousand, four hundred twelve".